Ground water compounds identified

Since sulfonate groups have been used in other ground-water tracers, the goal of this work was to synthesize several N-substi-tuted pyridone alkyl sulfonates which might be less susceptible to adsorption as well as more soluble. Alkyl sulfonates of varying chain lengths would be unique in a water system and separately identifiable by HPLC analysis. Two series of compounds were synthesized (Vla-c and Vlla-c). These compounds could be prepared by treating compounds III and IV with the appropriate lu-bromoalkyl sulfonate. 

Figure 6.2 demonstrates this in the case of a ground water sample from the former ammunition site in Elsnig (Germany). Many unknown compounds could be identified in the non-target analysis, e.g. 2,4-dinitrobenzoic acid (2,4-DNBA) and 3,5-dinitrophenol (3,5-DNP) which are major components (see Figure 6.2(a) and Table 6.1). 

After a toxicity threshold has been identified, the degree of attenuation and dilution that a compound is expected to undergo during transport through the ground water to... 

Methyl parathion has been released to the environment mainly as a result of its use as an insecticide on crops. It is applied to agricultural crops by aerial or ground spraying equipment. Methyl parathion has been detected in surface waters and sediments, rainwater, aquatic organisms, and food. There are no known natural sources of the compound. Methyl parathion has been identified in at least 16 of the 1,585 hazardous waste sites on the NPL (HazDat 2001). 

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